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1 files changed, 92 insertions, 0 deletions

diff --git a/sys/fio/fmkcopy.x b/sys/fio/fmkcopy.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<knet.h>
+include	<config.h>
+include	<syserr.h>
+include	<error.h>
+include	<fio.h>
+
+# FMKCOPY -- Create a null length copy of an existing file.  The new file
+# inherits all the directory attributes of the original file.  For example,
+# if the oldfile is an executable file, the new one will be too.  This avoids
+# file copy operations which copy the file data but lose file attributes.
+# Interrupts are disabled while the VFN database is open to protect the
+# database, ensure that that the lock on the mapping file is cleared, and to
+# ensure that the mapping file is closed.
+
+procedure fmkcopy (oldfile, newfile)
+
+char	oldfile[ARB]		# file to be copied
+char	newfile[ARB]		# newfile
+
+char	url[SZ_PATHNAME], old[SZ_PATHNAME]
+int	status, file_exists, junk
+pointer	vp, sp, oldosfn, newosfn
+int	vfnadd(), strncmp(), nowhite()
+pointer	vfnopen()
+errchk	delete, filerr, fmapfn, fclobber
+include	<fio.com>
+define	close_ 91
+define	abort_ 92
+
+begin
+	call smark (sp)
+	call salloc (oldosfn, SZ_PATHNAME, TY_CHAR)
+	call salloc (newosfn, SZ_PATHNAME, TY_CHAR)
+
+
+        # If we're given a URL to a file, cache it.
+	call aclrc (old, SZ_PATHNAME)
+        if (strncmp ("http:", oldfile, 5) == 0)
+	    return
+        else if (strncmp ("file:", oldfile, 5) == 0)
+	    return
+        else {
+            # Strip any whitespace at either end of the filename.
+            if (nowhite (oldfile, old, SZ_PATHNAME) == 0)
+                call syserr (SYS_FNOFNAME)
+        }
+
+	# Get OSFN of old file and verify that the file exists.
+
+	call fmapfn (old, Memc[oldosfn], SZ_PATHNAME)
+	call zfacss (Memc[oldosfn], 0, 0, file_exists)
+	if (file_exists == NO)
+	    call filerr (oldfile, SYS_FOPEN)
+
+	# Perform clobber checking, delete old file if one exists.
+	# Note that this must be done before opening the new VFN for
+	# writing or deadlock may occur.
+
+	call fclobber (newfile)
+	
+	# Add the new VFN to the VFN database and create the new file.
+
+	call intr_disable()
+	iferr (vp = vfnopen (newfile, VFN_WRITE))
+	    goto abort_
+	iferr (junk = vfnadd (vp, Memc[newosfn], SZ_PATHNAME))
+	    goto close_
+
+	call zfmkcp (Memc[oldosfn], Memc[newosfn], status)
+	if (status == ERR) {
+	    iferr (call filerr (newfile, SYS_FMKCOPY))
+		goto close_
+	} else
+	    iferr (call vfnclose (vp, VFN_UPDATE))
+		goto abort_
+
+	call intr_enable()
+	call sfree (sp)
+	return
+
+
+	# Error recovery nasties.
+close_
+	iferr (call vfnclose (vp, VFN_NOUPDATE))
+	    ;
+abort_
+	call intr_enable()
+	call sfree (sp)
+	call erract (EA_ERROR)
+end